I'm getting the same message. I was worried because yesterday my antivirus started detecting the launcher as a potentially dangerous file. I had to deactivate it to start the game, and even then I felt some serious lag from time to time. Then I logged out and tried again some hours later, but I couldn't even make the game start. I got a few GFAC errors, even after uninstalling and reinstalling the game several times. Also trying in other drive. I reinstalled it today again and got this error. So, I hope the lag was part of the issues that MageLo mentioned, and not of my connection.